高强超轻质溷凝土配合比设计与应用.pdfVIP

2009 8 38 8 CONSTRUCTION TECHNOLOGY 9 高强超轻质混凝土配合比设计与应用 时建刚, 吴光蓉, 孟勇军 ( 重庆鹏方路面工程技术研究有限公司, 重庆 400054) [ ] , , , SIKA TBJ 3 018% 0109% , 1 450kgPm , 28d 23MPa, , [ ] ; ; ; ; ; [ ] TU528101 [ ] A [ ] 1002-8498(2009) 08-00 9-03 Mix Proportion Design and Application of High-strength Ultra Lightweight Concrete Shi Jiangang, Wu Guangrong, Meng Yongj un ( Chongq ing Pengf ang Pavement Engineeri ng Research Insti tute Co . , Ltd . , Chongqi ng 400054, Chi na ) Abstract: The initial mix proportion of high-strength ultra lightweight concrete( HSULC) was determined by range analysis of orthogonal test. On the basis of initial mix proportion, HSULCwas optimized from apparent density andworkability, and the best mix proportion was put forward, of which the weight mixing amounts for SIKA water reducer and TBJ pumping aid were 018% and 0109% respectively. The results show that the concrete based on the best mix proportion has high fluidity, good homogeneity and no bleeding and segregation, and the wet surface density is less than 3 1 450kgPm , 28d compressive strength is 23MPa. This concrete has been successfully pumped in the new terminal station of Wuhan TianHe Airport. Key words: concrete; high-strength ultra lightweight concrete; apparent density; segregation degree; slump; mix proportion , AS100SIKA TBJ 1 [ 1] Table 1 Performance indexes of light coarse aggregate , , , P